I built mine allmost a year ago and before that i made custom 5.1 audio systems for a few people... I would like to share info and even get some new ideas regarding home-made analog 5.1 sound systems.
In order for me to help,you'll have to tell me more about your audio aplication(how powerfull you want your amps to be,etc)
Let me know what's on your mind,so I can try to guide you through.